Puppet-valve for internal-combustion engines.



G. R.,R|'cH-. -PUPPE'IVALVE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED NOV. IT I9I3'.

' 'Patented Mar. 1917.-

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-35` which seats upon the UNITED. sTATEs PATENT oEEIoE. l

GEORGE R. RICH, OF OAK PARK, ILLINOIS, ASSIGNOR TO RICH TOOL COMPANY, F

CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.y

PUPPET-VALVE FOR INTERNAL-COMBUSTION ENGINES.

To all whom z't may concern:

Be it known that I, GEORGE R. RICH, a citizen of the United States, anda resident of Oak Park, county of Cook, and Sta-te of Illinois, haveinvented certain new and useful Improvements in Puppet-Valves forInternal-Combustion Engines, of which the following is declared to be afull, clear, and exact description. This invention relates topuppetvalves for internal combustion engines and its object is toprovide a cheap, simple and eicient puppet valve of improvedconstruction and capable of successfully withstanding the effects of thehigh 'temperatured gases inci-` dent to internal combustion engines. Theuse of tungsten steel in the production of puppet valves ofthischaracter has become )recognizedvalmost universally since my discoveryof its use in this respect, and as disclosed in my prior Patent No.1,051,845, dated January 28, 1913, and this invention designs to providea puppet valve which can be constructed practicall as cheap as theordinary steel valve but- Kaving the characteristic of resisting theeffects of the high temperatures developed in internal combustionengines.

The invention consists ina kpuppet valve, having a sheet metal hoodformed of tungsten steel, or steel .containing a suitable percentage oftungsten, and. covering the vulnerable parts ofthe valve-that is, thehead or disk-and particularly the face 'thereof valveV seat, the hoodbeing arranged thereon in such a manner that the from the cylinderbetween the valve head and its hood.

40 The invention further consists inthe several novel featureshereinafter forth and,

claimed.

accompanying drawing in which Figure l, is a view, partly in centrallongitudinal section, of a puppet valve embodying one form of `thepresent invention, and showing it in position on a valve seat; Fig. 2,is an end view of the valve; Fig. 3, is a plan of a blank from 'whichthe hood isconstructed, and Fig. 4, is a central longitudinal section ofthe stamped .up into cup shape, and placed on the valve head prior tothe operation of securing it thereon. y'

Specification o f Letters Patent.`

pered valve seat 14, for -Th defects the end face 16, with gaseouscharge may not leak out partly in elevation andV eter than the blank,

Referring to said drawing, 10, designates the stem and 11, the'head of apuppet valve, constructed of steel, its peripheral edge or face 12,being of tapered formation, as is common. inpuppet valves of this class,and the stem and head being-preferably made integral with each other, asshown; 13, designates the Wall of a cylinder having a tathe valve. osefamiliar with the art, to which this invention belongs, know that partof the compressive `and explosive force in internal combustion enginesis expended toward the end -of .the valve head and that the exhaustgases pass between the seat 14, and the face or edge 12, of the valvehead, in discharging from the cylinder. Carbon deposits on the face oredge of the ordinary valve head and usually at one side o-f the head,and collects thereon to such an extent that the valve head cannot seatproperly after a yshortperiod of usage, thereby decreasing theeiilciency of the engine, because ofthe leakage of gas, and frequentlycausing the stem to warp at a po-int close to the head. These I haveovercome in a cheap puppet valve by making the valvehead of less size vthan its seat and combining with the body of the head a thin sheet metalimperforate hood 15, comprised of tungstenv steel or ,steel containing apercentage of tungsten,

saidhood conforming to the end 16, and face 12, of the hea-d.v To guardagainst leakage between the head portion 11, and Vhood 15, the latter isarranged to extend across p its edge portion bent around the taperedface of the head 11, as at 17, and forced tightly against the same.

he pressure of the gaseous charge and its discharge being in thedirection of thegarrows in Fig. 1, there is no possibility of leak- I Ii age between thehead portion and hood. The inventlon 1s clearlyillustrated 1n the In constructing the hood, I first form containing asuitable percentage of itungsten, the disks being of about one sixteenthof an inch inthickness and. of larger diamhead portion ofthe valve, soas to provide a marginal edge 15", at least as wide as the peripheraledge or face 12.

Thereafter the blank is stamped up into a cup shape (see Fig. 4.); theinner diameter of which isv practically the same as the v.largestdiameter of the head portion of the Patented Mar. 6, 191 '7. kApplication led November 17, 1913. 'Serial N o. 801,392.

valve. This cup shape member is then placed upon the head portion with'its flange surrounding the peripheral face thereof, and

while hot said flange is crowded down upon' 4the face, by suitable dies,

hood, whereby the valve is free to seat per! fectly at all times and thedanger of its stem warping is therefore practically eliminated. lf thehood wears loose on the head portion, it will still seat perfectly,because of the engagement of the tapered face of the head portion withthe tapered inner side of the flange 17.

It is obvious that other metals having the characteristics of tungstensteel may be employed in the hood and I desire to be understoodtherefore, as intending in the following claim to include suchsubstitutions for tungsten steel as are -equivalents thereof.-

claimas new and desire to secure' by Letters Patent A. puppet valve ofthe character described, formed with a head portion having a *ta-1Vpered face, and having a thin, flanged, imperforate disk of tungstensteel covering its end and tapered face, and permanently secured theretoin close. contact therewith..

GEORGE R. RlCl-l.

Witnesses:

H. E. MULLIGAN, U. H. MELLUM.

